Ch. 12

Question 1

Sampling

Answer 1

Process of selecting representatives of a target population for study in a research investigation

Question 2

Target population

Answer 2

Is the entire set of cases which the researcher would like to make generalizations about

Question 3

Accessible population

Answer 3

Most available for a study

Question 4

Non-probability or purposive sampling:

Answer 4

Not random, less generalized, convenience, quota, matching, network sampling (snow balling)

Presents in a representative sample, external validity bias

Question 5

Convenience sampling

Answer 5

Most commonly used

Participant may feel strongly about the study

Greatest risk of bias

Used what a highly unusual group is being studied

Question 6

Probability or non-purposive:

Answer 6

Uses randomization to include sample, general, representative, random sampling is not the same as random assignment to group

Question 7

Stratifies random selection

Answer 7

Placed into groups and then randomly selected (time consuming)

Cluster sampling

Question 8

Face validity

Answer 8

Refers to expert opinion of the validity of the content and does not refer to sampling techniques

Question 9

What are the issues with small and large sample sizes? Describe the purpose of a power analysis

Answer 9

Used to determine the target sample size that is needed to detect statistically significant differences or associations between two variables, depending on the test